64 bit SAP to 32 bit External Oracle Database connectivity failing

Dear All,
We are trying to connect to an external Oracle database thru DBCON method. We are able to connect to Oracle server from our IDES server which is a 32 bit server, but when we are trying to connect our development server which is a 64 bit server, the connectivity is failing.
we copied the correct 64 bit *.lib file to the SAP server but still same result. We are getting the error message - Work Process restarted. Session terminated.
the Oracle server we are trying to connect is 32 bit, can this create some problem ?
kindly any one help us in this reagrd.
thanks in advance,
Saurabh.

Hi Eric,
thanks for the advice but I am a bit confused as where to execute that sqlplus command/query ?
in the Oracle server or from SAP and what does system/password@DEV means ??
can you elaborate on this please.
here i would like to add that we have connected to the external Oracle server using linked server approach of MS SQL (our SAP default database) and so our connectivity is happening till SQL level i.e. I am able to connect to the Oracle and query it using OpenQuery syntax. the problem is appearing when I am trying to connect from the ABAP level.
kindly suggest as to what can be the solution of this issue.
thanks
Saurabh.

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